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Full text of "Handbook Of Chemical Engineering - I"

MECHANICAL SEPARATION
313
This type of separator is extensively used with grain separators and for drying and separating lint, etc. It will not separate the very finest particles and it is best suited to separations where the volume of air to be handled is
Wet separator				Dry separator		
	Dimensions	Water,	Capacity, cubic feet	Dimensions in inches		
Number		gallons	per minute			
						
	A	per		B	c	D
		minute				
1	66	2K	1,100	66	35	6M
2	75	3	1,500	84	43	8
3	84	3H	2,300	100	51	10
4	98	4	3,600	115	59	12
5	104	5	4,400	131	67	14
6	109	5M	5,900	150	75	17
7	117	6	6,900	166	84	19H
8	124	6K	8,200	173	92	21K
9	130	7	10,000	178	100	24
10	135	7K	11,800	197	107	26
11	146	8	13,600	204	115	28
12	156	sy2	15,500	220	124	29^
13	166	9	17,900	230	132	31
14	174	10	20,300	247	140	32K
15	189	12	23,100	253	148	34
16	200	14	26,500	272	156	36
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small. In the Raymond pulverizing and separating system by close circuiting the exit of the centrifugal separator with the grinding devices used the escape of fine particles is avoided and taken care of in a simple way. The Raymond system with its so called four-roller high-side mill has a capacity on talc of:
1  ton per hour 98 per cent through a 300-mesh screen. fl
2  tons per hour 99.5 per cent through a 200-mesh screen.
3  tons per hour 98 per cent through a 200-mesh screen.
A wet scrubber that will handle fume as well as dust 1 is the Feld illustrated in Fig. 33.1 This consists of a j number of separate washing chambers, one above the other, j The openings in the bottom of each chamber act as pas- I sage for the ascending gas as well as overflows for the  counter-current flow of the absorbing liquid.                "         &
The vertical shaft suspended from a self-centering, anti- j friction bearing is provided in each chamber with a series of j concentric frustums of cones. The spacing between the j
FIG. 32.
bottom of the chamber and the bottom of the cones increases   toward   the  shell,   to  provide  for  their  equable immersion in the scrubbing liquid, as well as to secure adequate agitation to avoid deposition of solids.
IT1 ok    A     1 000